#include <stdio.h>

int main(void){

    int i, n;
    unsigned long input;
    unsigned long ans = 0;    

    scanf("%d", &n);    
    for(i=0; i<n; i++){
        scanf("%ld", &input);
        ans += input;
    }
    
    printf("%ld\n", ans);
    return 0;
}